- stunnel-users - stunnel.org

client-server tunnelling
by Pietro Di Primo 09 Jul '08

09 Jul '08

Hi, I have a client server application, and want to tunnel it in this way: a script select a free port in a random way, write the stunnel.conf file. with "accept=<the_found_port>" and "connect=<my_server>" and run my client application passing to 127.0.0.1:<the_found_port> as server address. The problem is that i need to be sure that no other client or user can access <the_found_port> while the application is running. I guess that it should be possible to do it, but i wasn't able to. Can anybody help me? Thanks -- --- Ing. Pietro Di Primo INFN - Istituto Nazionale di Fisica Nucleare Grid Computing Research Area Via S. Sofia 78 95123 CATANIA (Italy) Voice : +39 095 378-5446/5517 Fax. : +39 095 378 5518 Mobile : +39 320 8591527 E-mail : pietro.diprimo(a)ct.infn.it Skype : pietrodiprimo

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FW: how to start ??
by dominique 07 Jul '08

07 Jul '08

Hello, First time I am using stunnel. 1. The issue I had is with Altiris and Exchange. All our Exchange Servers are SSL now and Altiris is not-SSL. Altiris is reading an exchange mailbox and gives back an error : "Error receiving data from socket". So the infrastructure is composed of two servers one Altiris Server not-SSL which is attempting to communicate to an Exchange Server with SSL. The Altiris Server is trying to read the email in one mailbox hosted by an Exchange SSL Server 2. Stunnel 4.25 x86-pc-mingw32-gnu with openssl 0.9.8h 28 May 2008 3. Windows 2003 Server environment 4. stunnel -d -r 5. 2008.07.07 13:34:41 LOG7[4748:1676]: RAND_status claims sufficient entropy for the PRNG 2008.07.07 13:34:41 LOG7[4748:1676]: PRNG seeded successfully 2008.07.07 13:34:41 LOG7[4748:1676]: Certificate: stunnel.pem 2008.07.07 13:34:41 LOG7[4748:1676]: Certificate loaded 2008.07.07 13:34:41 LOG7[4748:1676]: Key file: stunnel.pem 2008.07.07 13:34:41 LOG7[4748:1676]: Private key loaded 2008.07.07 13:34:41 LOG7[4748:1676]: SSL context initialized for service pop3 2008.07.07 13:34:41 LOG5[4748:1676]: stunnel 4.25 on x86-pc-mingw32-gnu with OpenSSL 0.9.8h 28 May 2008 2008.07.07 13:34:41 LOG5[4748:1676]: Threading:WIN32 SSL:ENGINE Sockets:SELECT,IPv6 2008.07.07 13:34:41 LOG5[4748:3596]: No limit detected for the number of clients 2008.07.07 13:34:41 LOG7[4748:3596]: FD 284 in non-blocking mode 2008.07.07 13:34:41 LOG7[4748:3596]: SO_REUSEADDR option set on accept socket 2008.07.07 13:34:41 LOG3[4748:3596]: Error binding pop3 to 149.142.194.230:995 2008.07.07 13:34:41 LOG3[4748:3596]: bind: Can't assign requested address (WSAEADDRNOTAVAIL) (10049) 2008.07.07 13:34:41 LOG3[4748:3596]: Server is down 6. no file gcc. Thanks, Dominique Dominique_duchemin(a)hotmail.com

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Using externally signed certificate with stunnel 4
by Tim Skirvin 07 Jul '08

07 Jul '08

I've got a comodo signed SSL certificate that I'm trying to use with stunnel4 to allow secure NNTP connections from a wide variety of clients. The certificate at least partially works; if I leave 'verify' off in the stunnel.conf file, then the service runs and users can connect, albeit while still having to verify the cert. But if I turn 'verify' on, then it doesn't work on *either* side. I've tried playing with CAfile and CApath without much luck. I'll attach my configuration files, the relevant pems, and some debugging information; is there something else I'm missing? I've already contacted comodo, and after several rounds of conversation they suggest I contact the list. Errors from the client side (note that I'm using a debug port here): + openssl s_client -connect news:565 -verify -debug verify depth is 0 CONNECTED(00000003) depth=2 /C=US/O=Entrust.net/OU=www.entrust.net/CPS incorp. by ref. (limits liab.)/OU=(c) 1999 Entrust.net Limited/CN=Entrust.net Secure Server Certification Authority verify error:num=19:self signed certificate in certificate chain verify return:0 6976:error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed:s3_clnt.c:951: ...and on the server, I get this: 2008.06.30 14:08:38 LOG7[10039:47679267941088]: nntps accepted FD=7 from 171.64.19.111:56122 2008.06.30 14:08:38 LOG7[10039:1073809760]: nntps started 2008.06.30 14:08:38 LOG7[10039:1073809760]: FD 7 in non-blocking mode 2008.06.30 14:08:38 LOG7[10039:1073809760]: FD 8 in non-blocking mode 2008.06.30 14:08:38 LOG7[10039:1073809760]: FD 9 in non-blocking mode 2008.06.30 14:08:38 LOG7[10039:47679267941088]: Cleaning up the signal pipe 2008.06.30 14:08:38 LOG6[10039:47679267941088]: Child process 10247 finished with code 0 2008.06.30 14:08:38 LOG7[10039:1073809760]: Connection from 171.64.19.111:56122 permitted by libwrap 2008.06.30 14:08:38 LOG5[10039:1073809760]: nntps connected from 171.64.19.111:56122 2008.06.30 14:08:38 LOG7[10039:1073809760]: SSL state (accept): before/accept initialization 2008.06.30 14:08:38 LOG7[10039:1073809760]: SSL state (accept): SSLv3 read client hello A 2008.06.30 14:08:38 LOG7[10039:1073809760]: SSL state (accept): SSLv3 write server hello A 2008.06.30 14:08:38 LOG7[10039:1073809760]: SSL state (accept): SSLv3 write certificate A 2008.06.30 14:08:38 LOG7[10039:1073809760]: SSL state (accept): SSLv3 write certificate request A 2008.06.30 14:08:38 LOG7[10039:1073809760]: SSL state (accept): SSLv3 flush data 2008.06.30 14:08:38 LOG7[10039:1073809760]: SSL alert (read): fatal: unknown CA 2008.06.30 14:08:38 LOG3[10039:1073809760]: SSL_accept: 14094418: error:14094418:SSL routines:SSL3_READ_BYTES:tlsv1 alert unknown ca 2008.06.30 14:08:38 LOG5[10039:1073809760]: Connection reset: 0 bytes sent to SSL, 0 bytes sent to socket 2008.06.30 14:08:38 LOG7[10039:1073809760]: nntps finished (0 left) Basic Requested Information that wasn't supplied above: * stunnel 4.18-2 on Debian etch (2.6.18-6-686 #1 SMP) * Running standalone with '/usr/bin/stunnel4 /etc/news/stunnel.conf' * libc6, no gcc, OpenSSL 0.9.8c-4etch3 * The log on startup: 2008.06.30 14:00:15 LOG7[26276:3083523776]: Snagged 64 random bytes from /root/.rnd 2008.06.30 14:00:15 LOG7[26276:3083523776]: Wrote 1024 new random bytes to /root/.rnd 2008.06.30 14:00:15 LOG7[26276:3083523776]: RAND_status claims sufficient entropy for the PRNG 2008.06.30 14:00:15 LOG7[26276:3083523776]: PRNG seeded successfully 2008.06.30 14:00:15 LOG7[26276:3083523776]: Configuration SSL options: 0x01000000 2008.06.30 14:00:15 LOG7[26276:3083523776]: SSL options set: 0x01000000 2008.06.30 14:00:15 LOG7[26276:3083523776]: Certificate: /etc/ssl/certs/news-stunnel.pem 2008.06.30 14:00:15 LOG7[26276:3083523776]: Certificate loaded 2008.06.30 14:00:15 LOG7[26276:3083523776]: Key file: /etc/ssl/private/news-stunnel.key 2008.06.30 14:00:15 LOG7[26276:3083523776]: Private key loaded 2008.06.30 14:00:15 LOG7[26276:3083523776]: Loaded verify certificates from /etc/ssl/certs/comodo.cert 2008.06.30 14:00:15 LOG7[26276:3083523776]: SSL context initialized for service nntps - Tim Skirvin (tskirvin(a)stanford.edu) -- Information Technology Services http://www.stanford.edu/~tskirvin/ System Software Developer, Unix Team Stanford University

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Windows setup
by Koenraad Lelong 04 Jul '08

04 Jul '08

Hello, I would like to know if it is possible to run a silent setup of the Windows-setup of stunnel. I'm including it in my own setup of my own application so I would like to avoid the interaction of the stunnel-setup. Second question is if it is bad to "install" stunnel more than once on a computer. Until now I had a setup for new installations and an update for updates of my application. This seems not to work because some users use the setup to update an existing installation and with this they run the install of stunnel for the second time. If it is bad, how do I detect the existance of stunnel, and what version it is, so I could update stunnel if it's outdated. Regards, Koenraad Lelong. P.S. If this is the wrong list for such questions I apologize. I would like to know the right list.

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Re: [stunnel-users] Stunnel 4.21 99% cpu ultilization
by Fat Wallet 03 Jul '08

03 Jul '08

Hi, If anyone have a clue on what I should do to fix this issue, I would really appreciated: One of the stunnel process is running at 99% and in R state and the time just keep incrementing. [root@root]# ps auxw|grep stunnel root 781 0.0 0.0 6520 2684 ? T 11:01 0:00 /usr/sbin/stunnel /etc/stunnel/stunnel.conf root 2853 0.0 0.0 3940 604 ttyp2 S+ 11:37 0:00 grep stunnel root 16554 0.0 0.0 3992 788 ? S Jul01 0:00 /usr/sbin/stunnel /etc/stunnel/stunnel.conf root 16555 0.0 0.0 3992 788 ? S Jul01 0:00 /usr/sbin/stunnel /etc/stunnel/stunnel.conf root 16556 0.0 0.0 3992 788 ? S Jul01 0:00 /usr/sbin/stunnel /etc/stunnel/stunnel.conf root 16557 0.0 0.0 3992 788 ? S Jul01 0:00 /usr/sbin/stunnel /etc/stunnel/stunnel.conf root 16558 0.0 0.0 3992 788 ? S Jul01 0:00 /usr/sbin/stunnel /etc/stunnel/stunnel.conf root 16561 0.0 0.0 6520 2684 ? Ts Jul01 0:00 /usr/sbin/stunnel /etc/stunnel/stunnel.conf root 16656 0.0 0.0 6520 2684 ? S Jul01 0:00 /usr/sbin/stunnel /etc/stunnel/stunnel.conf root 23954 0.0 0.0 6520 2684 ? S 08:00 0:00 /usr/sbin/stunnel /etc/stunnel/stunnel.conf root 23955 99.0 0.0 6520 2684 ? R 08:00 189:52 /usr/sbin/stunnel /etc/stunnel/stunnel.conf root 31521 0.0 0.0 6520 2684 ? S 10:30 0:00 /usr/sbin/stunnel /etc/stunnel/stunnel.conf Thanks, Mike ----- Original Message ---- From: Aron Griffis <agriffis(a)n01se.net> To: Fat Wallet <fat8wallet(a)yahoo.com> Cc: stunnel-users(a)mirt.net Sent: Monday, June 30, 2008 11:04:44 AM Subject: Re: [stunnel-users] Stunnel 4.21 99% cpu ultilization Fat Wallet wrote: [Mon Jun 30 2008, 01:28:11PM EDT] > Can someone please help with this issue? This 100% cpu > utilization issue happens randomly on multiprocess cpu. strace, ltrace, build stunnel with debugging symbols and attach gdb to the spinning process, etc. Is your name really Fat Wallet?

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protect the private key, while running stunnel in server mode as a windows service
by sandeep siroya 03 Jul '08

03 Jul '08

Hi, I have stunnel in server mode running as a windows service on a Win2003 Server system. I need to give this system to a different company for testing their client against our server. How do I protect my private key on stunnel, while letting the 3rd company being able to login as administrator on stunnel's win2003 system and start/stop stunnel service? I know one can protect the private key with a passphrase in stunnel, but that does not serve my purpose as stunnel in this case should be able to start/stop without any user-intervention and I cannot store the passphrase in cleartext. thanks , ss

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Peer suddenly disconnected
by victor.harutyunyan＠arca.am 02 Jul '08

02 Jul '08

Hello there, I have installed stunnel server on FreeBSD. I configure it like this cert=server_cert.pem key=private\server_key.pem socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 debug = 7 verify=2 CAfile=test_cert.pem [ssl_host_proxy] accept=172.24.150.15:1234 connect=192.168.1.1:10500 TIMEOUTidle=120 Client side is not a computer it's small device. I generate client certificates in this manor: echo off del test_ck.pem /q # delete previous test.ck.pem file echo Starting New test_ck file Generation C:\OpenSSL\bin\openssl.exe req -new -x509 -newkey rsa:2048 -sha1 -out test_cert.pem -keyout test_key.pem -nodes -config sample_ck.cnf -days 1825 -batch C:\OpenSSL\bin\openssl.exe pkcs8 -in test_key.pem -topk8 -out test_pk8.pem -passout pass:"TestPassword0001" -noiter -v1 PBE-SHA1-3DES del test_key.pem /q copy test_cert.pem+test_pk8.pem test_ck.pem /y del test_pk8.pem /q Echo New test_ck.pem file has the following sections: findstr "BEGIN END" test_ck.pem pause test_cert.pem is on a stunnel server as CAfile and test_ck.pem is on my small device which is capable to connect via stunnel. And I generate other self-signed CA, and generate one certificate request and sign it via this CA, and install that key and certificate on server. cert=server_cert.pem key=private\server_key.pem All is working fine, but after one year my server certificate has expired, when I regenerate new server certificate and try to connect, I see in server log this: Child process 6094 finished with code 0 SSL state (accept): before accept initialization SSL state (accept): SSLv3 read client hello A SSL state (accept): SSLv3 write server hello A SSL state (accept): SSLv3 write certificate A SSL state (accept): SSLv3 write server done A SSL state (accept): SSLv3 flush data SSL_accept: Peer suddenly disconnected And my device can't connect to the server, I haven't any client side logs and error messages, only NOT DELIVERED in my device. :( Can you please help me to solve this problem, I am trying many many times, I was very angry.. Thank you very much. Victor Harutyunyan. P.S. Sorry for my bad english.

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Peer suddenly disconnected
by victor.harutyunyan＠arca.am 02 Jul '08

02 Jul '08

Hello there, I have installed stunnel server on FreeBSD. I configure it like this cert=server_cert.pem key=private\server_key.pem socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 debug = 7 verify=2 CAfile=test_cert.pem [ssl_host_proxy] accept=172.24.150.15:1234 connect=192.168.1.1:10500 TIMEOUTidle=120 Client side is not a computer it's small device. I generate client certificates in this manor: echo off del test_ck.pem /q # delete previous test.ck.pem file echo Starting New test_ck file Generation C:\OpenSSL\bin\openssl.exe req -new -x509 -newkey rsa:2048 -sha1 -out test_cert.pem -keyout test_key.pem -nodes -config sample_ck.cnf -days 1825 -batch C:\OpenSSL\bin\openssl.exe pkcs8 -in test_key.pem -topk8 -out test_pk8.pem -passout pass:"TestPassword0001" -noiter -v1 PBE-SHA1-3DES del test_key.pem /q copy test_cert.pem+test_pk8.pem test_ck.pem /y del test_pk8.pem /q Echo New test_ck.pem file has the following sections: findstr "BEGIN END" test_ck.pem pause test_cert.pem is on a stunnel server as CAfile and test_ck.pem is on my small device which is capable to connect via stunnel. And I generate other self-signed CA, and generate one certificate request and sign it via this CA, and install that key and certificate on server. cert=server_cert.pem key=private\server_key.pem All is working fine, but after one year my server certificate has expired, when I regenerate new server certificate and try to connect, I see in server log this: Child process 6094 finished with code 0 SSL state (accept): before accept initialization SSL state (accept): SSLv3 read client hello A SSL state (accept): SSLv3 write server hello A SSL state (accept): SSLv3 write certificate A SSL state (accept): SSLv3 write server done A SSL state (accept): SSLv3 flush data SSL_accept: Peer suddenly disconnected And my device can't connect to the server, I haven't any client side logs and error messages, only NOT DELIVERED in my device. :( Can you please help me to solve this problem, I am trying many many times, I was very angry.. Thank you very much. Victor Harutyunyan. P.S. Sorry for my bad english.

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socket not getting closed
by Manjunath S Karikatti 02 Jul '08

02 Jul '08

Hello, We are using stunnel to wrap the tcp connetion between the our client session used by users and the server process. Due to some reason when client session terminates abruptly (either due to user's PC crash or network outage) the stunnel process does not terminate. We see that the socket on client PC is closed but stunnel process is still alive with socket for that PC in established state. This is on AIX platform. Do not know this is issue with stunnel process or something on AIX needs to be tuned (like the tcp_keepidle value). Thanks for any info and help. Thanks and Regards, Manjunath

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Re: [stunnel-users] Stunnel 4.21 99% cpu ultilization
by Fat Wallet 01 Jul '08

01 Jul '08

Thanks for your reply. I was hoping to see if someone have a similar issue since there was an issue with stunnel 4.20 version. Thanks, Mike ----- Original Message ---- From: Aron Griffis <agriffis(a)n01se.net> To: Fat Wallet <fat8wallet(a)yahoo.com> Cc: stunnel-users(a)mirt.net Sent: Monday, June 30, 2008 11:04:44 AM Subject: Re: [stunnel-users] Stunnel 4.21 99% cpu ultilization Fat Wallet wrote: [Mon Jun 30 2008, 01:28:11PM EDT] > Can someone please help with this issue? This 100% cpu > utilization issue happens randomly on multiprocess cpu. strace, ltrace, build stunnel with debugging symbols and attach gdb to the spinning process, etc. Is your name really Fat Wallet?

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Stunnel v4.25 vs v4.20
by James Moe 30 Jun '08

30 Jun '08

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello, I upgraded to v4.25 and stunnel aborts right away. v4.20 works just fine. What is protocol family 47? ====[ log file ]==== 2008.06.26 11:31:01 LOG5[282:8553]: stunnel 4.25 on i386-pc-os2-emx with OpenSSL 0.9.8h 28 May 2008 2008.06.26 11:31:01 LOG5[282:8553]: Threading: SSL:ENGINE Sockets:SELECT,IPv4 2008.06.26 11:31:01 LOG3[282:8553]: Error binding pop3.sma.com_L110-R995 to 127.0.0.1:110 2008.06.26 11:31:01 LOG3[282:8553]: bind: Address family not supported by protocol family (47) ====[ conf file ]==== socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 client = yes output = G:/c/voice/pmmdev/testcase/bin/stunnel.log verify = 0 debug = 5 cert = g:/c/voice/pmmdev/testcase/bin/sma-test.pem [pop3.sma.com_L110-R995] accept = localhost:110 connect = pop3.sma.com:995 ;# protocol = pop3 [smtpauth.earthlink.net_L6025-R587] accept = localhost:6025 connect = smtpauth.earthlink.net:587 protocol = smtp [sohnen-moe.com:L6125:R587] accept = localhost:6125 connect = sohnen-moe.com:587 protocol = smtp [smtp.sma.com_L25-R587] accept = localhost:25 connect = smtp.sma.com:587 protocol = smtp - -- jimoe (at) sohnen-moe (dot) com -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (OS/2) iD8DBQFIY+DkzTcr8Prq0ZMRArW+AJ4uOJFOGyluIj52DG4cM62jMPs8NACfbug2 oVsLAXJ+fH1Raj568dGn2mM= =JSCM -----END PGP SIGNATURE-----

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Re: [stunnel-users] Stunnel 4.21 99% cpu ultilization
by Fat Wallet 30 Jun '08

30 Jun '08

Hi, Can someone please help with this issue? This 100% cpu utilization issue happens randomly on multiprocess cpu. Thanks! ----- Original Message ---- From: Fat Wallet <fat8wallet(a)yahoo.com> To: stunnel-users(a)mirt.net Sent: Monday, June 23, 2008 10:39:16 AM Subject: Stunnel 4.21 99% cpu ultilization Hi All, I've been googling for this issue but it seems like google is not my friend at the moment. I am running Linux with 4 cpus and top command shows stunnel at 99-100% cpu. Please help. //stunnel configuration file # PID is created inside chroot jail pid = /var/run/stunnel.pid # debug debug = 7 output = /var/log/stunnel.log # Authentication stuff verify = 2 cert = /etc/stunnel/cert.pem CAfile = /etc/stunnel/ca.pem #Some performance tunings socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 # Use it for client mode client = yes /////////// stunnel version stunnel 4.21 on i686-pc-linux-gnu with OpenSSL 0.9.7a Feb 19 2003 Threading:PTHREAD SSL:ENGINE Sockets:POLL,IPv6 Auth:LIBWRAP Global options debug = 5 pid = /var/run/stunnel.pid RNDbytes = 64 RNDfile = /dev/urandom RNDoverwrite = yes Service-level options cert = /etc/stunnel/stunnel.pem ciphers = ALL:!ADH:+RC4:@STRENGTH key = /etc/stunnel/stunnel.pem session = 300 seconds sslVersion = SSLv3 for client, all for server TIMEOUTbusy = 300 seconds TIMEOUTclose = 60 seconds TIMEOUTconnect = 10 seconds TIMEOUTidle = 43200 seconds verify = none //openssl version OpenSSL 0.9.7a Feb 19 2003 //Redhat version Red Hat Linux release 9 (Shrike) root]#cat /proc/cpuinfo | grep processor | wc -l 4 http://stunnel.mirt.net/mailman/listinfo/stunnel-users

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UPNP & Nat-PMP with Stunnel
by Dean Shavit 26 Jun '08

26 Jun '08

Stunnel works great for me, but with dynamic port forwarding, I've not been able to get it working. I suspect it's because stunnel is a bit confusing about which port to reply to... Anyone else found a way to crack this nut?

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How do I kill stunnel?
by Grant Edwards 25 Jun '08

25 Jun '08

I've got an application that starts stunnel using equivalent of a fork/exec. The stunnel process then appears to fork off multiple copies of itself. Before the application exits, it needs to stop stunnel. I send a SIGINT to the PID that was created using the fork, but only the first "master" copy terminates -- the master stunnel process doesn't terminate its children when it exits. So I end up with a bunch of "orphaned" stunnel processes. They're not zombies, they're process that are either in state R or S (runnable or sleeping). How do I tell stunnel to not only terminate, but to terminate whatever child processes it has created? -- Grant Edwards grante Yow! Zippy's brain cells at are straining to bridge visi.com synapses ...

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Stunnel config files incompatible between 4.05 and 4.21 ?
by Brian McKee 25 Jun '08

25 Jun '08

Hi All, I have a stunnel config file that works fine on an older Mandrake machine running stunnel 4.05. If I use that same config file on a new Ubuntu machine running 4.21 it just dies with "/etc/stunnel/stunnel.pem: No such file or directory" IIUC, running in client mode it doesn't need a .pem file, and I didn't create any certifcates on the Mandrake machines. Do I need to generate a cert for some reason? I've attached the config below. Brian =============================== client = yes [telnet] accept = 23 connect = some.ip.number.removed:992 [as-central] accept = 8470 connect = some.ip.number.removed:9470 [as-database] accept = 8471 connect = some.ip.number.removed:9471 [as-rmtcmd] accept = 8475 connect = some.ip.number.removed:9475

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Is the "HTTP Proxy connect" feature implemented?
by alex Wright 24 Jun '08

24 Jun '08

Hey, I'm trying to use stunnel in the following scenerio: ssh-client -> stunnel (to ssl) -> Proxy -> server(ssl to ssh). I downloaded stunnel 4.25, but I hadn't noiticed any support for this. However, in the "patches" page (http://www.stunnel.org/patches/) - three patches seem to be suitable: (connect-proxy_dunbar.patch<http://www.stunnel.org/patches/patches/connect-proxy_dunbar.patch>, connect-proxy.mwald.patch<http://www.stunnel.org/patches/patches/connect-proxy.mwald.patch>) but are for version 4.05 (whichwill probably be a pain to merge with current version). When I stumbled upon the Changelog ( http://www.stunnel.org/download/ChangeLog.txt) I noticed that version 4.15, has support for "Client mode CONNECT protocol" - which is what I need - and altough i had looked hard, I haven't found any documentation to it. So, is the above feature what I want (and if so - how do I use it?) or do I need to update the patches to the current version? Thanks in advance, Alex.

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Stunnel 4.21 99% cpu ultilization
by Fat Wallet 23 Jun '08

23 Jun '08

Hi All, I've been googling for this issue but it seems like google is not my friend at the moment. I am running Linux with 4 cpus and top command shows stunnel at 99-100% cpu. Please help. //stunnel configuration file # PID is created inside chroot jail pid = /var/run/stunnel.pid # debug debug = 7 output = /var/log/stunnel.log # Authentication stuff verify = 2 cert = /etc/stunnel/cert.pem CAfile = /etc/stunnel/ca.pem #Some performance tunings socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 # Use it for client mode client = yes /////////// stunnel version stunnel 4.21 on i686-pc-linux-gnu with OpenSSL 0.9.7a Feb 19 2003 Threading:PTHREAD SSL:ENGINE Sockets:POLL,IPv6 Auth:LIBWRAP Global options debug = 5 pid = /var/run/stunnel.pid RNDbytes = 64 RNDfile = /dev/urandom RNDoverwrite = yes Service-level options cert = /etc/stunnel/stunnel.pem ciphers = ALL:!ADH:+RC4:@STRENGTH key = /etc/stunnel/stunnel.pem session = 300 seconds sslVersion = SSLv3 for client, all for server TIMEOUTbusy = 300 seconds TIMEOUTclose = 60 seconds TIMEOUTconnect = 10 seconds TIMEOUTidle = 43200 seconds verify = none //openssl version OpenSSL 0.9.7a Feb 19 2003 //Redhat version Red Hat Linux release 9 (Shrike) root]#cat /proc/cpuinfo | grep processor | wc -l 4 http://stunnel.mirt.net/mailman/listinfo/stunnel-users

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Using Stunnel on Vista
by John Lallemand 18 Jun '08

18 Jun '08

We have a system that needs a TN3270 client and Stunnel to connect on XP. Currently, OnNet Host/Rumba is the most popular TN3270 client in use. But when we try these programs on Vista, the connection times out. 1) Is Stunnel Vista compatible? 2) If it is, does Stunnel need specific settings to work on Vista? Thank you! ------------------------------ John Lallemand Software Release Manager University of California, Santa Cruz

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Problem with multiple stunnel jobs
by Carter Browne 17 Jun '08

17 Jun '08

A couple of days ago, I upgrade from 4.15 to 4.23 on a Linux system running Redhat 8. At the same time I went from openssl 0.9.8g to 0.9.8h. No changes were made to the configuration file. After the change, rather than starting a single process, it starts 6 processes. The process number of the lowest number process is the one that is put into the /var/run/stunnel.pid file. When I try to stop stunnel, using /etc/init.d/stunnel stop, the lowest number process is kill, and the highest number process seems to be running continuously - although it is not a hard cpu loop, but it keeps on accumulating run time. The number of processes may not be a new phenomenon, but the inability to kill itself is. I normally restart the stunnel on a daily basis to keep the log files manageable, but with this new behavior, the /etc/init.d/strunnel restart command fails because the ports are still in use. Any ideas on how to fix this problem. Thanks, Carter -- Carter Browne CBCS cbrowne(a)cbcs-usa.com 781-721-2890

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Goldmine 8 & Advisormail SSL problems
by Stephen E. Rischall 17 Jun '08

17 Jun '08

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stunnel service problems...
by Jeremy Paje 10 Jun '08

10 Jun '08

Has anyone had any problems with the windows stunnel service not starting automatically? We install stunnel as a service (stunnel.exe -install) We've had it previously installed on 600+ machines with no problems, but recently (noticed on slower machines running XP) the stunnel service does not start...but it happens randomly only on slower machines. The following errors are in the event log... Timeout (30000 milliseconds) waiting for the stunnel service to connect. (Event ID ID 7009) AND The stunnel service failed to start due to the following error: The service did not respond to the start or control request in a timely fashion. (Event ID 7000) I've tried setting the service to restart if failed, and to delay 2 minutes before restart, etc with no luck. If you start the stunnel manually all is well, it just doesn't start on bootup. Any suggestions? Thanks JP

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Re: [stunnel-users] stunnel compatibility question
by Brian Hatch 09 Jun '08

09 Jun '08

Roughly around 2008-06-09 11:34 -0400, Patel Dippen-CDP054 kibitzed: > In this scenario, can Stunnel listen on the UDP port on the local No. Stunnel will not listen on UDP ports. Stunnel will not send UDP packets. Stunnel doesn't support UDP. -- Brian Hatch The problem is that you'd Systems and probably make something Security Engineer useful of my life that http://www.ifokr.org/bri/ I would never do. Every message PGP signed

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Fw: Re: stunnel compatibility question
by Jeffrey Buck 06 Jun '08

06 Jun '08

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Re: [stunnel-users] stunnel compatibility question
by Brian Hatch 05 Jun '08

05 Jun '08

At almost 2008-06-05 09:37 -0400, Patel Dippen-CDP054 cajoled: > I guess what I am stating is can Stunnel listen on a UDP port The answer to that question is 'no, it cannot.' -- Brian Hatch "I was looking at bringing Systems and up some new servers on Security Engineer imaginary hardware." http://www.ifokr.org/bri/ --Jason Every message PGP signed

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stunnel compatibility question
by Jeffrey Buck 04 Jun '08

04 Jun '08

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